{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-cpu0e9if","versions":[{"created_at":"2026-06-30T20:03:09Z","element_count":81,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"5cb356791709ef00f155946a1aba21acae41f541471130f3aa7642afaead0a5d","version":3},{"created_at":"2026-06-30T19:53:06Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e430f7f1e69c0b50e3b37936f900478564002beaffcc749fc2c265fe9cbedf02","version":2},{"created_at":"2026-06-30T19:53:06Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}